Golint fixes

Godeps/Godeps.json

@@ -20,7 +20,7 @@
 		},
 		{
 			"ImportPath": "github.com/minio-io/iodine",
-			"Rev": "b279ca8ea714fabc969883a4d1612a4e93d01611"
+			"Rev": "f92ca01c8671d9565c7aa58e3427364c5e187ccf"
 		},
 		{
 			"ImportPath": "gopkg.in/check.v1",

Godeps/_workspace/src/github.com/minio-io/iodine/iodine.go

@@ -1,5 +1,5 @@
 /*
- * Iodine, (C) 2014 Minio, Inc.
+ * Iodine, (C) 2015 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,8 +21,10 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"path"
 	"runtime"
 	"strconv"
+	"strings"
 	"sync"
 )
 
@@ -43,25 +45,30 @@ type StackEntry struct {
 	Data map[string]string
 }
 
+var gopath string
+
 var globalState = struct {
 	sync.RWMutex
 	m map[string]string
 }{m: make(map[string]string)}
 
+// SetGlobalState - set global state
 func SetGlobalState(key, value string) {
 	globalState.Lock()
 	globalState.m[key] = value
 	globalState.Unlock()
 }
 
+// ClearGlobalState - clear info in globalState struct
 func ClearGlobalState() {
 	globalState.Lock()
-	for k, _ := range globalState.m {
+	for k := range globalState.m {
 		delete(globalState.m, k)
 	}
 	globalState.Unlock()
 }
 
+// GetGlobalState - get map from globalState struct
 func GetGlobalState() map[string]string {
 	result := make(map[string]string)
 	globalState.RLock()
@@ -72,7 +79,16 @@ func GetGlobalState() map[string]string {
 	return result
 }
 
-// Wrap an error, turning it into an iodine error.
+// GetGlobalStateKey - get value for key from globalState struct
+func GetGlobalStateKey(k string) string {
+	result, ok := globalState.m[k]
+	if !ok {
+		return ""
+	}
+	return result
+}
+
+// New - instantiate an error, turning it into an iodine error.
 // Adds an initial stack trace.
 func New(err error, data map[string]string) *Error {
 	entry := createStackEntry()
@@ -86,18 +102,46 @@ func New(err error, data map[string]string) *Error {
 	}
 }
 
+// createStackEntry - create stack entries
 func createStackEntry() StackEntry {
 	host, _ := os.Hostname()
 	_, file, line, _ := runtime.Caller(2)
+	file = strings.TrimPrefix(file, gopath) // trim gopath from file
+
+	data := GetGlobalState()
+	for k, v := range getSystemData() {
+		data[k] = v
+	}
+
 	entry := StackEntry{
 		Host: host,
 		File: file,
 		Line: line,
-		Data: GetGlobalState(),
+		Data: data,
 	}
 	return entry
 }
 
+func getSystemData() map[string]string {
+	host, err := os.Hostname()
+	if err != nil {
+		host = ""
+	}
+	memstats := &runtime.MemStats{}
+	runtime.ReadMemStats(memstats)
+	return map[string]string{
+		"sys.host":               host,
+		"sys.os":                 runtime.GOOS,
+		"sys.arch":               runtime.GOARCH,
+		"sys.go":                 runtime.Version(),
+		"sys.cpus":               strconv.Itoa(runtime.NumCPU()),
+		"sys.mem.used":           strconv.FormatUint(memstats.Alloc, 10),
+		"sys.mem.allocated":      strconv.FormatUint(memstats.TotalAlloc, 10),
+		"sys.mem.heap.used":      strconv.FormatUint(memstats.HeapAlloc, 10),
+		"sys.mem.heap.allocated": strconv.FormatUint(memstats.HeapSys, 10),
+	}
+}
+
 // Annotate an error with a stack entry and returns itself
 func (err *Error) Annotate(info map[string]string) *Error {
 	entry := createStackEntry()
@@ -127,3 +171,11 @@ func (err Error) EmitHumanReadable() string {
 func (err Error) Error() string {
 	return err.EmbeddedError.Error()
 }
+
+func init() {
+	_, iodineFile, _, _ := runtime.Caller(0)
+	iodineFile = path.Dir(iodineFile)   // trim iodine.go
+	iodineFile = path.Dir(iodineFile)   // trim iodine
+	iodineFile = path.Dir(iodineFile)   // trim minio-io
+	gopath = path.Dir(iodineFile) + "/" // trim github.com
+}

Godeps/_workspace/src/github.com/minio-io/iodine/iodine_test.go

@@ -1,5 +1,5 @@
 /*
- * Iodine, (C) 2014 Minio, Inc.
+ * Iodine, (C) 2015 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"errors"
-	"log"
 	"testing"
 )
 
@@ -38,16 +37,16 @@ func TestIodine(t *testing.T) {
 	}
 	var prettyBuffer bytes.Buffer
 	json.Indent(&prettyBuffer, jsonResult, "", "  ")
+	if prettyBuffer.String() == "" {
+		t.Fail()
+	}
 }
 
 func TestState(t *testing.T) {
 	SetGlobalState("hello", "world")
-	state := GetGlobalState()
-	if res, ok := state["hello"]; ok {
-		if res != "world" {
-			t.Error("global state not set: hello->world")
-		}
-	} else {
+	result := GetGlobalStateKey("hello")
+	if result != "world" {
+		t.Error("global state not set: hello->world")
 		t.Fail()
 	}
 	ClearGlobalState()
@@ -85,7 +84,6 @@ func TestState(t *testing.T) {
 		}
 	} else {
 		err.Annotate(nil)
-		log.Println(err.EmitHumanReadable())
 		t.Error("foo2 should be set")
 	}
 }

pkg/encoding/erasure/ctypes.go

@@ -24,32 +24,32 @@ import (
 )
 
 // Integer to Int conversion
-func int2CInt(src_err_list []int) *C.int32_t {
-	var sizeErrInt = int(unsafe.Sizeof(src_err_list[0]))
+func int2CInt(srcErrList []int) *C.int32_t {
+	var sizeErrInt = int(unsafe.Sizeof(srcErrList[0]))
 	switch sizeInt {
 	case sizeErrInt:
-		return (*C.int32_t)(unsafe.Pointer(&src_err_list[0]))
+		return (*C.int32_t)(unsafe.Pointer(&srcErrList[0]))
 	case sizeInt8:
-		int8Array := make([]int8, len(src_err_list))
-		for i, v := range src_err_list {
+		int8Array := make([]int8, len(srcErrList))
+		for i, v := range srcErrList {
 			int8Array[i] = int8(v)
 		}
 		return (*C.int32_t)(unsafe.Pointer(&int8Array[0]))
 	case sizeInt16:
-		int16Array := make([]int16, len(src_err_list))
-		for i, v := range src_err_list {
+		int16Array := make([]int16, len(srcErrList))
+		for i, v := range srcErrList {
 			int16Array[i] = int16(v)
 		}
 		return (*C.int32_t)(unsafe.Pointer(&int16Array[0]))
 	case sizeInt32:
-		int32Array := make([]int32, len(src_err_list))
-		for i, v := range src_err_list {
+		int32Array := make([]int32, len(srcErrList))
+		for i, v := range srcErrList {
 			int32Array[i] = int32(v)
 		}
 		return (*C.int32_t)(unsafe.Pointer(&int32Array[0]))
 	case sizeInt64:
-		int64Array := make([]int64, len(src_err_list))
-		for i, v := range src_err_list {
+		int64Array := make([]int64, len(srcErrList))
+		for i, v := range srcErrList {
 			int64Array[i] = int64(v)
 		}
 		return (*C.int32_t)(unsafe.Pointer(&int64Array[0]))

pkg/encoding/erasure/erasure_decode.go

@@ -41,12 +41,13 @@ func (e *Encoder) Decode(chunks [][]byte, length int) ([]byte, error) {
 	m := int(e.params.M)
 	n := k + m
 	if len(chunks) != n {
-		return nil, errors.New(fmt.Sprintf("chunks length must be %d", n))
+		msg := fmt.Sprintf("chunks length must be %d", n)
+		return nil, errors.New(msg)
 	}
 	chunkLen := GetEncodedBlockLen(length, uint8(k))
 
 	errorIndex := make([]int, n+1)
-	var errCount int = 0
+	var errCount int
 
 	for i := range chunks {
 		// Check of chunks are really null
@@ -63,7 +64,7 @@ func (e *Encoder) Decode(chunks [][]byte, length int) ([]byte, error) {
 		return nil, errors.New("too many erasures requested, can't decode")
 	}
 
-	errorIndex_ptr := int2CInt(errorIndex[:errCount])
+	errorIndexPtr := int2CInt(errorIndex[:errCount])
 
 	for i := range chunks {
 		if chunks[i] == nil || len(chunks[i]) == 0 {
@@ -71,7 +72,7 @@ func (e *Encoder) Decode(chunks [][]byte, length int) ([]byte, error) {
 		}
 	}
 
-	C.minio_init_decoder(errorIndex_ptr, C.int(k), C.int(n), C.int(errCount-1),
+	C.minio_init_decoder(errorIndexPtr, C.int(k), C.int(n), C.int(errCount-1),
 		e.encodeMatrix, &decodeMatrix, &decodeTbls, &decodeIndex)
 
 	pointers := make([]*byte, n)
@@ -81,7 +82,7 @@ func (e *Encoder) Decode(chunks [][]byte, length int) ([]byte, error) {
 
 	data := (**C.uint8_t)(unsafe.Pointer(&pointers[0]))
 
-	ret := C.minio_get_source_target(C.int(errCount-1), C.int(k), C.int(m), errorIndex_ptr,
+	ret := C.minio_get_source_target(C.int(errCount-1), C.int(k), C.int(m), errorIndexPtr,
 		decodeIndex, data, &source, &target)
 
 	if int(ret) == -1 {

pkg/encoding/erasure/erasure_encode.go

@@ -26,19 +26,23 @@ import (
 	"unsafe"
 )
 
+// Technique - type of matrix type used in encoding
 type Technique uint8
 
+// Different types of supported matrix types
 const (
 	Vandermonde Technique = iota
 	Cauchy
 	None
 )
 
+// Default Data and Parity blocks
 const (
 	K = 10
 	M = 3
 )
 
+// Block alignment
 const (
 	SIMDAlign = 32
 )

pkg/utils/cpu/cpu.go

@@ -21,17 +21,17 @@ package cpu
 // int has_avx2 (void);
 import "C"
 
-// CPUID instruction verification wrapper for SSE41 extensions
+// HasSSE41 - CPUID instruction verification wrapper for SSE41 extensions
 func HasSSE41() bool {
 	return int(C.has_sse41()) == 1
 }
 
-// CPUID instruction verification wrapper for AVX extensions
+// HasAVX - CPUID instruction verification wrapper for AVX extensions
 func HasAVX() bool {
 	return int(C.has_avx()) == 1
 }
 
-// CPUID instruction verification wrapper for AVX2 extensions
+// HasAVX2 - CPUID instruction verification wrapper for AVX2 extensions
 func HasAVX2() bool {
 	return int(C.has_avx2()) == 1
 }

pkg/utils/crypto/sha1/sha1_darwin.go

@@ -98,10 +98,10 @@ func (d *digest) Write(p []byte) (nn int, err error) {
 }
 
 // Return checksum bytes
-func (d0 *digest) Sum(in []byte) []byte {
+func (d *digest) Sum(in []byte) []byte {
 	// Make a copy of d0 so that caller can keep writing and summing.
-	d := *d0
-	hash := d.checkSum()
+	d0 := *d
+	hash := d0.checkSum()
 	return append(in, hash[:]...)
 }
 

pkg/utils/crypto/sha512/sha512_darwin.go

@@ -6,6 +6,7 @@ import (
 	"crypto/sha512"
 )
 
+// The size of a SHA512 checksum in bytes.
 const (
 	Size = sha512.Size
 )